Combined floor and beam mold for concrete work.



B. B. HARTMAN.

comsmeu. noon AND BEAM MOLD roa CONCRETE WORK.

APPLICATION FILED OCT-2101912 RENEWED JULY 6,19l8.

Patented Feb. 25, 1919.

m u an s FEYER: cm. Moro-rum. w. n N an. a. c.

RUDOLPH B. HARTMAEN, OF MILWAUKEE, WISCONSIN.

COMBINED FLOOR'AND BEAM MOLD FoRooNoRETE WORK.

Specification of Letters Patent.-

Original application filed March '21, 1908, Serial 'No.'422',537. Divided and this application filed October 21; 1912, SerialNo. 726,939, "Renewed July 6, 191 8. Serial No. 243,705;

To all whom'z't may concern:

Be 1t known that I, RUDOLPH'B1HART- MAN, of Milwaukee, lV1scons1n',*have 1nvented Combined Floor and Beam Molds for Concrete Work, of which the following is a specification.

This invention relates to monolithic structural concrete, and has for its object, gen-- erally speaking, to facilitate, expedite, and

generally improve the method and manner in which such work is erected, and my present invention is more particularly appli cable to the construction of the floors and roofs of buildings, taken in connection with the columns and beams which support them.

The present application is substantially cially to the construction of panel floor-.-

molds, as adapted to the so-called suspension method of supporting forms for floors and beams, and especially to the method of application and construction of the forms for subsidiary beams. This is generally adopted in what is known as the composite con struction, where the main supporting structure of the building is of steel and the concrete is used either solely as an incasing medium and for the floor-filling or as a supplement to the steel in forming the subsidiary beams. In such cases my method of construction is extremely advantageous because it enables me to work on a number of floors of the building simultaneously as soon as the steel framework has been erected, thus'greatly increasing the rapidity of construction. Furthermore, in this composite construction the use of my mold in the manner hereinafter described andclaimed enables me to dispense with even a part of the structural steel in the main beams,=and even girders, since their place may be taken by reinforced concrete beams cast inplace and supported from the steel framework.

My invention consists in the constructions and combinations and other features, which are hereinafter described and more particulardly set forth in my claims.

Referring to the accompanying drawings illustrative of my invention Figure 1 is a plan view of an arangement of sectional form such as is used in the steel-concrete composite construction;

one such panel and part of another;

Fig. 3 is 'a transversesection through a series of such panels, showing ,the manner-of' replacing part of the mainsteel beams by concrete beams 1 Patented Feb. 25, 1919.1

subsidiary beams in such construction.

The reference letters refer each' to the same part in each figure of the drawingsr In Fig.1 the steel work is omitted, only a single complete unit or panel of the framework being shown.

The main girders, which are of steel, are designated and the subsidiary girders, also of steel, are designated 8, these latter extendingat right-angles to the former-and being supported thereby. In each panel of the floor having for its sides two subsidiary girders 8 and for its ends two main girders*-*' panel is supposed to be additionally subdivided and supported by a number ofconcrete beams, which are provided for in'the 7 is inserted the panel-mold as shown in the drawing, and in this construction each floor following manner. The mold is constructed generally of sheet-iron side-pieces '9 and 10 and corner pieces 11 all as described in my aforesaid application, these pieces abutting against or overlying each other as may be I found advantageous. The length of each side-section 10 on the long sides-should be equal to the distance between any two of the concrete beams which are'to'be formed, and the side-sections do not adjoin each other but have inserted between them sheetmetal troughs 12 which may as shown be formed in a'plurality of sections overlying or abuting one another and have on their ends special pieces 13 which are cut off at an angle corresponding to the angle between the top and side-faces of the sections. These in case these 16 may be set to abut. against'the sides gussets l l maybe 'omittedbeca'use not nec-' of the troughs 12, in which "case "the essary to prevent the sides of said troughs from bulging out when the concrete is poured into them. It will be seen that I am thus enabled to provide as many subsidiary concrete beams as may be desired.

In this construction the means which I employ for supporting the forms in position is as follows. The beam-bottom 17 for incasing the main girders are supported directly from the latter by means of rods 18 bent into the form of stirrups and having their ends 19 bent around the upper flanges of said girders as shown. A plank 20 may be inserted below the plank 17 if desired for securing great rigidity, but this may be omitted. The sides 21 of the girder-casing are supported upon the plank 17 and the end-edges of the members 9 and 11 in turn rest on these planks 21. The dotted line 22 indicates the floor level after the concrete is poured. In the same manner the bottom planks 23 of the subsidiary girder casings are supported from the sibsidiary girders 8 by means of stirrups 24, but in this case I have shown how a part of said subsidiary steel girders may be replaced by concrete beams, resulting in a great saving of steel, and also greater economy of time and labor. The stirrups 24 depending from the subsidiary steel girders 8 which are left in the construction (these may be alternate girders) support directly short pieces 25 upon which rest directly a series of wooden joists 26 parallel to the main girders, and these in turn support the casing bottoms 23 and the beam bottoms 27 of those concrete beams 28 which are destined to replace a part of the ordinary steel beams. 'In place of the steel of said beams a number of reinforcing rods 29 would then be put in place in the concrete beam;

When the subgirclers and beams are deeper than the forms of my panel mold, I may, instead of using the usual plank sides as shown in Fig. 2, use an extension-mold consist ing of a plurality of sections 30 which are of sheet metal having either channel or angleshaped section, with gussets 31 to which are secured distance-planks 32 by means of bolts 33. These are shown in Figs. 2 and 3 as extending only on two sides of the panel, but might be made to extend all around if desired.

In Figs. 4 to 7 inclusive I have shown adjustable troughs which may be used instead of the plain nonadjustable troughs shown in Figs. 1 and 2, so that the same trough forms may be used for diiferent depths and widths of beams.

In Fig. 4'is shown a trough made up of a pair of Z-shaped sheet-metal sections 34 having triangular gussets 35 to holes in which are secured at intervals a series of U-shaped pieces 36 which may bemade from a small channel bar bent twice at rightangles in the manner shown. Upon the lower flanges 37 of the sections 34 lies a plank 38, which may either form the bottom of the beam, or in case the beam is of a less depth, the plank 38 will be merely a restplank, over which is placed a second plank 39, which is the real beam-bottom, and may be raised any desired distance above the plank 37 by intercalating blocks 40.

In Fig. 5 is shown a trough-form composed of two angle-shaped sections 41 hav ing gussets 42, and two other angle-shaped sections 43 whose sides abut against the sections 41 and whose bottoms overlie one another, the whole being supported by a U- shaped bar 44 having a number of holes 45 therein whereby it is secured to the gussets 42 by means of pins 46 passing through any of said holes, whereby the member 44 can be raised or lowered in order to increase or lessen the depth of beam. The width may be varied in the same way by using members 44 of greater or lesser opening.

In Fig. 6 is shown a trough form made up I of a pair of angle-pieces 47 s1m1lar to the angle-pieces 41, but having longer vertical limbs and provided with triangular gussets 47. The bottom is made up of a channelshaped section 48 which lies between the vertical faces of the sections 47, and is supported upon a set of bolts 49 which join together -the members 47 at intervals, these bolts being insertible into any one of a number'of holes vertically, whereby the member 48 can be set at any height within the capacity of the pieces 47. To strengthen the bottom of the member 48 and prevent it from bulging,

I may provide it on its endsand intermediately downwardly extending flanges or braces 50. V

In Fig. 7 is shown a trough-form capable of a greater range of adjustment than either of the others. Fig. 5 are used in connection with a pair of members 51 of angle-shaped section having the bottom flanges overlap and the sidefaces abutting upon the faces of the members 41. These are supported by drop-bars 52 which are connected with the gussets 42 by the pins 46, and said bars have in their lower portions a plurality of holes 53 acting in conjunction with a cross-bar 54 having likewise a plurality of holes 55 therein to receive bolts 56. As the width and depth of beams generally varies by twoinch intervals, it will be sufiicient to place the holes 53 and 55 at a. distance of two inches in order to get from the form any width and depth of beam desired. Furthermore the depth may be adjusted by supporting the beam-bottom 57 upon blocks 58 which rest on a plank 59, which rests on the flanges of the anglepieces 51 as shown. I

It will be readily understood that the wide scope of myinvention enables me to illus- The'angular members 41 of trate only a few forms thereof within the limits in this specification, and that I therefore do not intend in any way to limit the scope of m invention merely to said forms; consequent y I reserve the right to make such changes, modifications, and alternative constructions as are included within the scope of my claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A mold for concrete floor and roofwork comprising lateral sides made up of a plurality of sheet-metal sections, each having a side-face and a top-face united by gussets on the under side, a plurality of transverse distance-members in the nature of beams connecting opposite sections, a plurality of planks resting on said distance-members and filling the space from side to side of the mold between said sections, said sections and planks being separated endwise by a transverse space across the mold, and auxiliary beam-troughs located in said transverse space.

2. A mold for concrete floor and roofwork comprising lateral sides each made up of a plurality of sheet-metal sections, each having a side-face and a top-face united by gussets on the under side, a plurality of transverse distance-members in the nature of beams connecting opposite sections, a plurality of planks resting on said distancemembers and filling the space from side to side of the mold between said sections, said sections and planks being separated endwise by a transverse space across the mold, and auxiliary beam-troughs located in said transverse space, and having horizontal flanges on their upper edges which rest upon said planks.

3. In concrete floor and roof-work, in combination with a panel-mold for a floor-panel having an upper surface and a lateral surface, the latter representing part of the surfaces of the adjoining beams, an extensionmold having sheet-metal vertical sides having an upper flange and one or more strengthening flanges, and a "lurality of transverse distance-members in t e nature of beams connecting said sides and united thereto to form a rigid structure, said extension-mold bein located immediately below said first-mentioned mold to constitute an extension thereof, the sides of the panelmold being supported by said upper flanges of the extension-mold.

4. In concrete floor and roof-work, in combination with two adjacent beams or girders which are to support the finished floor, of supporting temporary beams, suspended from and transversely below said beams, a plurality of floor-panel molds having upper surfaces for the floor-slabs and up-and-down lateral faces for molding the sides of the beams and girders, extension-molds resting upon said temporary beams, and having upper flanges upon which the floor-panel molds are supported, the sides of the extension molds being in alinement with the lateral faces of the floor-panel molds and constituting extensions thereof.

5. A mold for concrete floor and roofwork comprising sheet-metal side-members, each side-member formed in sections separate from each other, distance-members in the nature of beams extending from side to side of said side-members and united thereto, planks resting upon the distance members, and forming upper mold surfaces and beam-troughs extending transversely from side to side and between said sections and supported upon said planks.

In witness whereof I have hereunto set my hand in presence of two witnesses.

RUDOLPH B. HARTMAN.

Witnesses:

FREDERICK D. TUCKER, GEORGE W. CoLLEs.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

